1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbeb35367777f14d35dc34124483abfc979656348db164606b1c0d261961117. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bf5f2d1-8593-4fa5-b28a-0d9b57c87d84.json and https://artists.proofprofile.net/proofs/artist/3bf5f2d1-8593-4fa5-b28a-0d9b57c87d84.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a8bb105b47dc09692733bab7a77f532bcf35c347f01b41727c53c376769e85. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:11:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ52186067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf401a3ade079345e18a672823e35ccfc7c27dff47087edc8cd92aa39579bbb49. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6J2185386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6376ef2e6984ece7d225ffd6c9bc5cd61de13922d824ba189e5a559c878be96. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2223079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b93107c3e460bc18a42e73d11981a92f5ab223f21f47852579c9c2d06d29b7. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEQ2274090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9829fcd20528fb5b7ba283c605f48051e11907435bddb16469b28ff98f105610. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWY2276766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3b9cfc98d7c54d9298f018e6e7a203e66bd709af33d2c64a38c551f6ec5e67. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB92219441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78d3ea7e43c82f00da8d839165479f1522be4878f560dde04acd20417427d07. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBB2271472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bdde0fa7794adc5374f61fb656311397474a49e90680446357e1e541e247c3. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2370216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931762569d0063ab5e4143614d12b10f05caf3ef387823913f51120f7a064084. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:53:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYZ2360880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eeebbe6ba80281985354256cb2590dfd23fce551d5cd3e1e2de12fb69c9cae2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA52311253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5bfcabe3c92b80f62b3ea01971cf136bb80c5fec757703c62383714947bdb8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES52352728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda949df3852e0114e198668c4f21ba0ac9673fc12aa55c42c21e1d3d2ae3d166. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2361106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcc8b4e85441901193e937404cdcad64681364f8ee5ecb325099fad64630191. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:45:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMER2384296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed93371bf986d7c817e3f97692ce5f5286855364bbbbaa0033552f3b50f9119c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:57:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBE2381401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71e1f1ac8e86ddfaa9fe805e87c109b7850c02019453a43329b9d1d33d80915. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFE2364991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8839f84ec5c940e278121c1de2b3297298a9928d26371e0246d75e94dc395b21. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82498301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfaeaaa1f8ebe2f4f8078d648025d310fc2d9fdee806cca6d00c09347d89c17. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN82401865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb190fe717acff93d9c00c0f20040164be9fd87c371d48c57726911dbe101e6a3. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2412204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92af1effaad778e2dd4e82db0d69f1fd75b06f1f25ee52bb00880d800a145c06. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAU2415547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd86115704a72ff2b14de0d2ba047d4b8dde9f8f599a4c3e3cc2db59bcbefea. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:51:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFG2413402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed47df1f6f63d3adecba80c8fee1a3d896b4226ea9e2e6dd061b1893b9f868f1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ772413155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eee30f5b995e4d0296933f9b502b33728bf39125066e5f40d6b4896b12ef6cd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3EX2477701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb806c41f4876435b7af4ccb419c5dd9299b2c9bf24f46decabb3176521981a4b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TLVEM2467343.